Navbar : Lock current orientation in edit mode

Freeze current orientation during edit mode.
Jira : https://jira.cyanogenmod.org/browse/CYAN-1117

Change-Id: I61a852855b70011291a242f3068f67336ba61131

Conflicts:
	src/com/android/settings/Utils.java
	src/com/android/settings/cyanogenmod/NavBar.java